-LRB- CNN -RRB- -- Boston bombing suspect Dzhokar Tsarnaev has tweeted since the Boston Marathon bombings on what two friends of his tell CNN is his Twitter account .

His tweets included one at 1:43 a.m. Wednesday that said , `` I 'm a stress free kind of guy . ''

On Monday at 8:04 p.m. -- hours after the bombings -- he tweeted a quote from rapper Jay-Z and a 1970s R&B song , `` Ai n't no love in the heart of the city . '' The tweet added , `` stay safe people . ''

Shortly after midnight , on Tuesday morning , he tweeted , `` There are people that know the truth but stay silent & there are people that speak the truth but we do n't hear them cuz they 're the minority . ''

Tsarnaev uses the handle `` J_tsar '' and does not describe himself in the profile , which reads only , `` Salam aleikum , '' a greeting among Muslims . The profile photo is the face of a lion with its mouth open , baring its fangs .

He has tweeted a dozen times since the bombing .

The most recent tweet is one he retweeted on Wednesday from Mufti Ismail Menk , who identifies himself as a Muslim scholar . `` Attitude can take away your beauty no matter how good looking you are or it could enhance your beauty , making you adorable , '' the tweet reads .

Another tweet from Tsarnaev on Tuesday was a quote from rapper Eminem : `` Nowadays everybody wan na talk like they got somethin to say but nothin comes out when they move their lips ; just a bunch of gibberish . ''

After another Twitter account posted a photo Tuesday saying it showed a man who was going to propose to his girlfriend at the marathon in Boston and found her dead , Tsarnaev tweeted a two-word response : `` fake story . ''

Another of the suspect 's tweets , an apparent response to someone else 's tweet , reads , '' and they what ` god hates dead people ? ' Or victims of tragedies ? Lol those people are cooked . ''

Also Tuesday , Tsarnaev tweeted , `` So then I says to him , I says , relax bro my beard is not loaded . '' On Friday , another Twitter user retweeted that message , and added the words , `` But my backpack is . ''

Other items that he wrote , well before the Boston bombings , on the social media site may offer more details pertinent to the investigation .

On August 10 , 2012 , for instance , Tsarnaev wrote -- in response to another user -- `` Boston marathon is n't a good place to smoke tho . '' The context of this conservation , however , was not known .

@highlight

NEW : A cryptic tweet last August refers to the Boston Marathon

@highlight

2 friends of suspect Dzhokar Tsarnaev tell CNN this is his Twitter account

@highlight

Hours after the bombing , he tweeted `` stay safe ''

@highlight

He tweeted that a photo of an alleged Boston bombing victim was fake